I don't see why this is a problem (apart from supposedly private data like email), it's not just Google that can do this, all this data is available to everyone for everyone who can use it to benefit. If you want to make Google pay for a publicly available good, tax them accordingly. That's the point of taxes: if you are successful enough to take advantage in any way from a country's public roads, education system, access to a labour market and a functioning society generally, taxing the massive profits from using that system is fair, not enclosing everything and holding access to the content we contributed hostage.